Research of Nonlinear Flight Loads Calculation on a Flexible Aircraft

According to the requirment of Military Aircraft Strenth and Rigidity Specification, the flight loads calculation methods and results by taking a fighter as an example have been introduced in this paper, considering aircraft construction flexibility, nonlinear aerodynamic characteristics and aerodynamic load distribution. The influence of nonlinear aerodynamic characteristics and load distribution of a flexible aircraft on the choices of flight loads calculating regimes and severe load cases has been compared and analysed, then the aircraft severe loads design cases and design loads have been decided, and some practical engineering solution have been also reached. The analysis presents that the introduced flight loads calculating method is reasonable and efficient and the result is believable.